We need to mandate (by appropriately subsidizing improvements while taxing externalities) houses become more energy efficient at heating and cooling, so we can use as little AC and heating as possible and try to stop some of the runaway energy usage due to extreme weather events. Install window fans, ceiling fans, attic fans, use evaporative coolers in dry climates, install H/ERVs. Change your AC and heating to a hea…
Insulating houses is balance between cost of insulating and cost of heating/cooling. It's no use spending more on insulation than you save in power use. So "as much as possible" is a wrong goal, as well as being obviously unachievable.